OK, that's what I suspected and others discerned to be your meaning. Now let me give you a 'simple english' version that's wordy but utterly unambiguous:

"I'm comparing two folders. If a file or subfolder is NOT found in the second but is present in the first, copy the missing item from the first to the second; otherwise... simply log that a file or dir was found in BOTH folders."

Note that this expression does NOT concern itself with items found in the second folder, but not the first. That's a different requirement and requires a different problem statement.

As with programming, communicating anything even mildly complex depends heavily on clarity and precision.